417 struct cache {  struct
418 	struct cache_set	*set;  argument
419 	struct cache_sb		sb;  argument
420 	struct cache_sb_disk	*sb_disk;  argument
421 	struct bio		sb_bio;
422 	struct bio_vec		sb_bv[1];
447 	 * cached data in them, and we can't reuse them until after we write  argument
455 	size_t			fifo_last_bucket;
458 	struct bucket		*buckets;
467 	unsigned int		invalidate_needs_gc;
469 	bool			discard; /* Get rid of? */
494  * Flag bits, for how the cache set is shutting down, and what phase it's at:  argument
529 	struct cache		*cache;  member